Merge pull request #110 from eko/2.3-develop

SONATA-287 - Fix newsletter block to be handled in ajax
Added catalog index
Fixed test for ecommerce PR
Merge pull request #112 from Bladrak/fixedPriceUpdateUrl

Fixed price update url
Removed catgory listing
Merge pull request #111 from sylvaindeloux/SONATA-300

Product catalog
Implement auto price update in demo
Merge pull request #114 from Bladrak/priceUpdateAjax

Implement auto price update in demo
Improve news display